mineral

Tumbled turquoise cabochon

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; possibly stabilized or dyed material

AI-generated identification · may be incorrect

Blue-green, opaque, waxy to subvitreous luster with dark brown/black matrix. Mohs hardness 5–6; cryptocrystalline triclinic mineral with no obvious cleavage; specific gravity about 2.6–2.9.

Identified August 18, 2026More mineral →

Explore Tumbled turquoise cabochon in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Blue-green, opaque, waxy to subvitreous luster with dark brown/black matrix. Mohs hardness 5–6; cryptocrystalline triclinic mineral with no obvious cleavage; specific gravity about 2.6–2.9.

Formation & geological history

Forms as a secondary copper-aluminum phosphate in arid, oxidized zones of copper deposits, commonly replacing host rock. Most natural turquoise is Cenozoic or younger, although exact age depends on the deposit.

Uses & applications

Used for beads, cabochons, carvings, and ornamental jewelry; lower-grade material is also used for decorative objects. Common specimens are inexpensive, while vivid natural turquoise with attractive matrix can be valuable.

Geological facts

The intense color comes mainly from copper, while iron may produce greener tones. Many commercial pieces are stabilized with resin, reconstructed from powder, or dyed; these treatments can be difficult to confirm visually.

Field identification & locations

Likely identification clues are its opaque turquoise color, soft waxy surface, and matrix veining, but the image cannot prove natural turquoise versus dyed howlite or resin composite. Common sources include Iran, Arizona, Nevada, China, and Mexico.